Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2958ca259e52a25…

MALICIOUS

PDF

74.3 KB Created: 2021-06-13 01:04:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 448c5235f30963de1b4955fd1c6f71ed SHA-1: 3f26e7f455fa05df87d942fb64cc35cd49e3129e SHA-256: c2958ca259e52a254b2c002056ace6e3a11575a541932af174d8bc754fb9c8a0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL points to a site offering a "control screen rotation mod apk", suggesting a lure for phishing or a scam. While no scripts were directly extracted, the PDF structure and external URI heuristic indicate it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ketchas.ru/pbw?utm_term=control+screen+rotation+mod+apk PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4411702/normal_5fe26af549c24.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383912/normal_5ff0e6aec8e70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374364/normal_60c1c3e0a1f47.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9845dc1-573d-4162-b230-69605ea78c74/31818963254.pdfIn PDF document text
    • http://vibuvedatixi.pbworks.com/f/rabuvim.pdfIn PDF document text
    • http://mokapuv.pbworks.com/w/file/fetch/144612381/60249100816.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acf6cf41-1be6-4560-9889-3bf5676e7f96/japagok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c37e328-9530-4545-9328-1c5f9abba73f/how_to_use_interdynamics_ez_chill.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19bcfd35-fa79-4dfc-ab0b-2c1bb609b8af/go_ask_alice.pdfIn PDF document text
    • http://zutaman.pbworks.com/w/file/fetch/144827844/gta_5_psp_rom_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4aac7eba-2a53-4212-a69d-2481d19d6c5b/how_to_reset_brookstone_digital_clock.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6602ab7c-ca74-4605-a17a-30d3e843c151/58672302303.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6273d845-ce75-450c-afc0-683acc3e4675/dofunetuzazogakafabu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbad6c71-997e-40ae-b2fc-5055b534ccdc/kumibetomid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae01d045-dc97-4bb7-9033-09d354ab7b68/pairon_mein_bandhan_hai_payal_ne_machaya_shor_video.pdfIn PDF document text
    • http://natizasex.pbworks.com/w/file/fetch/144411933/do_you_have_to_print_your_southwest_boarding_pass.pdfIn PDF document text
    • http://gitixofipoxu.pbworks.com/f/8136369878.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7c10b88-37a0-484d-b418-1593a3222163/jump_rope_workout_routine_for_quickness.pdfIn PDF document text
    • http://watusuxipidu.pbworks.com/w/file/fetch/145213287/financial_statement_analysis_and_security_valuation_penman.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b19ab211-b913-42f3-bb7a-ef67b420eceb/bifovejenubimugamofiwimak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb58baea-2819-405e-ad8c-87da0fb1b644/57293568326.pdfIn PDF document text
    • http://lekipirunezi.pbworks.com/f/vexoxumap.pdfIn PDF document text
    • http://jutifakukap.pbworks.com/w/file/fetch/144807462/baluwurewafajifoxi.pdfIn PDF document text
    • http://nozobitativi.pbworks.com/f/lokixejodumixapaxogulokeb.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e675.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE675 5188 bytes
SHA-256: 59c5eb265c989d7449652dbdccf45ee19fd5793ab1052916f92c1c97de5282e5
font_01_sfnt_off0000f800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF800 10472 bytes
SHA-256: 023e9e2be1dc26b4cda051cddc5d8e0fbb5a5b9da8040634223b88a0164655b0